docs: fix payment success typo

[scosemicolon]

Fixes a small README typo in the speed settings bullet:

• succesful -> successful

This keeps the x402 payment experiment documentation polished for readers trying the flow.

Summary by CodeRabbit

• Documentation
  • Corrected spelling in "Key Features" section
  • Clarified "Speed settings" documentation to explain how it controls payment confirmation timing, with options ranging from simulated to confirmed

[vercel]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: b15996fb-ba6e-442d-91d1-720ac6f4f69f

📥 Commits

Reviewing files that changed from the base of the PR and between d33502c and f67e54c.

📒 Files selected for processing (1)

• README.md

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Walkthrough

README.md corrects a spelling error in the "Speed settings" feature description, changing "succesful" to "successful", and adds clarification that Speed settings control when a payment is considered successful, with options ranging from simulated to confirmed.

Changes

Documentation clarity and spelling fix

Layer / File(s)	Summary
Speed settings documentation README.md	Spelling correction ("succesful" → "successful") and added clarification that Speed settings is a configuration controlling payment-success timing from simulated to confirmed.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title accurately reflects the main change: fixing a typo in the documentation where 'succesful' was corrected to 'successful' in the README.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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